Abstract: A mine fuze timer having a ball serving as a locking element, which ball is released after the elapse of a predetermined time period. Such time period may be determined by a timer by exerting needed load against a readily deformable material, or as an alternative, by a dash-pot using a viscous liquid. The mine fuze timer is glued to the top of a mine containing a borerider and is encased in a mine canister. A fuze for small caliber ammunition, with a barrier consisting of two halves tied together by a soft wire and locked in safe position by two setback pins. The stretching and the eventual ruture of the soft wire, under the influence of spin which follows the setback at the time of firing, ensures the necessary safety delay for arming.